Create a label in the Opera Mail you're not going to use and drag all the messages for the account that you want to put into the other Opera Mail into the label. Then, right-click the label and export it to name.mbs.

Haven't tried your suggestion but it seems like it might work - Thank you.

The reason I wanted to do this is now no longer needed. I was having trouble with blank rows within the RSS feeds when I opened Opera Mail. I created another copy to see if it was a corrupt database as someone had suggested.

The same thing continued in the new copy of Opera Mail and I found out how it happens.

If I leave any RSS feed selected and shut down Opera Mail it may or may not create those blank rows. If I shut Opera Mail down and anything in the mail section is selected I have no problems.

Also I noticed that if I select Compose and any RSS feed is selected I lose most of the features associated with composing. So as long as I'm anywhere in the mail section and not the RSS feed section all is well.